Washington:The White House Coronavirus Task Force has warned of a possibility that there would be a more transmissible Covid-19 variant that evolved in the US.
The task force said the recent spike in cases has been at nearly twice the rate seen in the spring and summer seasons, Xinhua news agency quoted the report as saying.
"This acceleration suggests there may be a 'USA variant' that has evolved here, in addition to the UK variant that is already spreading in our communities and maybe 50 per cent more transmissible," said the report, calling for aggressive mitigation to match a much more aggressive virus.
"Without the uniform implementation of effective face masking (two or three-ply and well-fitting) and strict social distancing, epidemics could quickly worsen as these variants spread and become predominant," it added.
Scott Gottlieb, the former Commissioner of the Food and Drug Administration, told CNBC News on Friday that the new strain the Task Force has found appears to be behaving like the one circulating in the UK.
Read:|Spike in cases of new UK mutant strain
The latest development came as the country has identified a total of 52 cases the British coronavirus variant, according to data updated on Thursday by the Centers for Disease Control and Prevention (CDC).
Twenty-six cases were reported in California, 22 in Florida, two in Colorado, and one each in Georgia and New York.